Burner



H, D, DUFAULT March 28, 1933.

BURNER P iled March 28. 1952 2 Sheets-Sheet l Wbb/w05 @trof/wup.

March 28, 1933. v H. DfDuFAULT BURNER Filed March 28. 1952 A 2Sheets-Sheet 2 Ela-.5.. 9

A anwwtoz ff. E. ufau ZZ- f Yew.

@R01/Muto.

Patented Mar. 28, 19133 UNITED STATES PATENT oFElcE HOMER D. DUFAULT, OFEASTHAMPTON, MASSACHUSETTS, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS,OF ONE-SIXTH TO ALDERIC F'UGERE, ONE-SIXTH T0 E'UCLIDE FUGERE, ONE-SIXTHT ADAM BOUCHER, ONE-SIXTH T0 HENRY BERNIER, AND ONE-SIXTH T0 HIRAMBERNIER, ALL OF EASTHAMPTON, MASSACHUSECE'TS BURNER Application filedMarch 28, 1932. Serial No. 601,679.

The invention relates primarily to either liquid or gas fuel burners ofa type designed -for use in fire-boxes of heating or cooking stoves,such as those originally intended for burning solid fuel. Water-backs orcoils in the fire-boxes (usually only in those of kitchen ranges)receive adequate heat from the burners when the latter are operating toproduce maximum temperature, but when the burners are turned down for alow fire,

the water-backs or coils do not receive sufli-` tric upwardlydischarging burner rings, and

a connecting neck placing said rings in communication with each other,and a further object is to provide this'neck with gas dischargeperforations or the like to aid in initially lighting the burner.

A 'further object is to provide a novel construction for supporting theburner and holding the latter and its support against relative sliding.

With the foregoing and minor objects in view, the invention resides inthe novel subject matter hereinafter described and claimed, descriptionbeing accomplished by reference to the accompanying drawings.

Fig. 1 is a perspective view partly broken away and in section showingtwo of the improved burners installed in the fire-box ofa kitchen range.

Fig. 2 is a vertical, sectional view on line 2-2 of Fig. 1.

Fig. 3 is a top plan view with the perforated air and gas mixing wallsremoved.

Fig. 4 is a detail vertical sectional view on line 4-4 of Fig. 3.

Fig. 5 is a bottom plan view of one of the burners, partly broken awayand in section.

Fig. 6 is a top plan view of the burner support.

A preferred construction has been shown and will be specificallydescribed, with the understanding however that within the scope of theinvention as claimed, variations may bemade. Furthermore, while a gasburner has been disclosed, it is to be understood that my improvementscould well be embodied ,in a burner for consuming liquid fuel.

Duplicate burners B have been shown mounted upon a support S, but adescription of one of said burners will suffice.

The burner B embodies inner and outer concentric burner rings orconduits 10 and 11 disposed in a horizontal 'plane and spaced apart bynecks 12, 13 and 14, so that secondary air inlets 15 are providedbetween said rings, the space 16 within the inner ring 10. forminganother air inlet. The necks 13 and 14: may be of'solid cross sectionbut neck 12 is hollow and establishes communication between the rings 10and 11. These rings are provided respectively with perforations 17 and18 disposed inv their upper sides and adapted for discharging gasupwardly between perforated concentric walls 19, 20, 21 and 22 which areheld in spaced relation with each other vby fitting against annularshoulders or the like 23 on` the burner rings. Direct upward rush of airfrom the opening 16 through the wall 19, is prevented by a cap 24resting upon the latter, and to prevent such direct upward rush of airfrom the inlets' 15 between the walls 2O and 21, a ring 25 rests uponthe upper ends of these walls.

The upper side of the hollow neck 12 is provided with a plurality of gasdischarge openings 26. When lighting the burner, if the gas from theseopenings first becomes ignited, they lead the flame to the gasdischarging through both sets of perforations `17 and 18. Similarly, ifthe gas from either of these sets of perforations 17 and 18 firstbecomes ignited, the gas discharging through the perforations 26,` leadsthe flame to that discharging from the other of said sets. When a pilotsuch as P of Fig. 1 is employed, the gas from the perforations 18usually ignitcs first, that from the perforations 26 next, and finallythat from the perforations 17. lVhether this sequence takes place ornot, the pcrforations 26 materially aid in insuring almost instantaneousigniting of the gas discharging from all of the perforations.

At the outer side of the ,ring 11, is a short horizontal gas conduit 27which communicates with said ring 11 and is substantially tangentialthereto. This conduit 27 is preferably about straight, and its outerside is provided with a plurality of perforations 28, preferably formedthrough nipples 29, said perforations being horizontal or slightlyinclined and being adapted to outwardly direct jets of flame against awater-back W (Fig. 1) o'r against a coil. These jets of flame thusinsure effective heating of the waterback or the like even when the gassupply to the burner is turned down for a low ire. Hence, a difficultyheretofore encountered w'th burners of the general types to which theinvention relates, is effectively overcome.

An upstanding air and gas mixer 30 is provided for the burner B, theupper end of said mixer being threaded into an opening in a boss 31which is preferably formedJ on the lower side of the conduit 27,oppos'te the neck 12, so that the mixture of air and gas enteringthrough said mixer, may distribute about uniformly in the rings 10 and11, said conduit and said neck. Gas is discharged into the mixer 30through a conventional Spud or the like 32 connected with a valved gasline 33. The mixer is upwardly movable from the Spud or the like andmerely rests upon the support S. When two burners are employed, thissupport is of the specific shape shown in Fig. 6. In this and a numberof the other views, 34 denotes a horizontal plate supported by avertically adjustable standard 35, said plate having crescent-like ends36 upon which the outer rings 11 of the two burners, rest. These ringsare provided with downwardly projecting studs 37 removably received inopenings 38 in the plate portions 36, thereby holding the support andthe burners against relative sliding but permitting said burners to bereadily lifted from the support if desired, for instance, when cleaningis necessary.

The standard 35, in the construction shown, is provided with a base 39having ad? justing screws 40, allowing leveling of the entire burnerstructure to obtain the best results.

It will be seen from the foregoing that Anovel and advantageousprovision has been made for carrying out the objects of the invention,and while the details disclosed are preferably followed, attention isagain in-y vited to the fact that vari ations may be made within thescope of the invention as claimed.

I claim 1. In a burner, a horizontal upwardly discharging burner ring, ashort ysubstantially straight horizontal fuel conduit joined to andcommunicating with said ring, said conduit being substantiallytangential to the outer periphery of sai-d ringand having fuel dischargemeans adapted to outwardly discharge fuel for heating a water-back orthe like, and v conduits, .said horizontally discharging con-4 duitbeing adapted for heating a water-back or the like. y

3. In a burner, inner and outer concentric horizontal burner ringshaving fuel discharge perforations in their upper sides, a neck con- Inecting and establ'shing communication between said rings, said neckhaving initial lighting fuel discharge perforations in its upper side, ashort substantially straight horizontal fuel conduit joined to andcommunicating with said outer ring, said conduit being substantiallytangential to the outer periphery of said outer ring and havingsubstantially horizontal outwardly directed fuel discharge perforations,and a fuel inlet for said rings and conduit, said conduit being adaptedfor heating a water-back or the like.

In testimony whereof I ax my signature.

. HOMER D. DUFAULT.

